Fluid-controlled drill-bit swaging and sharpening machine.



y 1G. LEYNER,

GONTROLLED DRILLv BIT SWAGING AND SBIARPENING MACHINE.

, Patented May 11, 1909.

2 SHEETS-SHEET 2.

JOHN GEORGE Lernen, or nENvER, COLORADO.

FLUB-CGNTROLLED DRILL-BIT SWAGN NID SHAPENING MACHINE.

Speeication of Letters Patent. Patented May 11, 1 909.

Application filed November 6, 1907. Serial No. 400,955.

fo all whom 'it mag/ concern: Be 1t known tha t l, JOHN GEORGE LEYNER, a citizen of the Unlted States of America,re

siding in the city and county of Denver and State of Colorado,

have invented a new and useful 1Fluid-Controlled lrill-lit Swagin and Sharpening Machine, of which the follow-.f

ing is a specification. My lnvention relates to fluid controlled drill bit swaging and sharpening machines;

and the objects of my invention ar'e: first, to provide a fluid controlled drill Sharpener .provided with a group of squeezing `and pressing dies adaptedto act in unison and at the same time to squeeze and pressthe ribs at thef rock-cutting' head endl of cruciform shaped drill tool steel, into. proper form.

adapted to j ointlv Second, to provide a iuid controlled drill bit sharpening machine, that is provided with drill steel gripping jaws, coperating with a .reciprocating dolly to form a plurality of V- `shaped rock cutting lips on a drillbit, and with lagroupv of swaging squeezer and presser dies L engage at one [operative movement all of the ribs and interstilces of the rock cutting head portion of oruciform ishaped drill tool steel, and squeeze and presslit into perfect form. And third,to provide e simple, quick action, powerful drill bit arpening machine, which is adapted to retive' a variety of gripping and forming dies, for sharpening drills of. diiierent styles. l attainthese objects by the mechanism illustrated in the accompanying drawings, in which: i v

v{Figur-e I1, is a front elevation of the improved drill Sharpener. Fig. 2, is a rear elejvation' of thesame'. Fig. 3, is a central ver- [tic/eel,V sectional view thereof, showing a drill' `cisrnp`ed in position to be acte d'upon by the squeezers. Fig. 4, is a side elevation' of the :drill holder and Sharpener detached from its- .'supporting standard. 5, '1s a view of a portion of the standard forming part of the upper portion of the Sharpener, the squeezeis 4being removed. Figs.

o and 7, are respectively. a plan view and a side elevation of one 'of 'the' pivoted squeezers.

"respectively a front and side elevation of a piston-operated squeez'er', which acts' in conjunction with the pivoted squeezers.

Similarletters of reference refer to similar throughout the several views.

li'eferlingto the drawings, the numeral 1,- .55' the supporting stand o f my duid- Fias. 8 and 9 are` controlled drill Sharpener. This stand comprises a floor or foundation base 2, a vhollow vertical column or standard `3, and a to 4 or table portionl', all of which are preferab y of circular'form.' Upon this supporting-stand, l place the drill Sharpener and holder, which comprisesa cylinder 5, which sets onl and is secured to the table ortion of the stand by any suitable means, llint referably bybolts or cap screws 6. rihis cy inder is open at its bottom, the table portion forming its lower cylinder head, and it is closed at its upper end by an integral head 7 .'1

ber, in which a piston8-is 1eciprocallymount ed, and which is provided with ashort piston-rod or stem 9, that extends through an aperture l0, formed in thejupper head of the cylinder.

A verticallyv proje standard 11, is formed on the top of cylinder, having acentral bore, which forms a continuation ol'- the aperture'lO, ir- 'fie upper cylinder.v head 7L The thickness of this standard is less than the diani:" er of the piston stem, hence its'bore 12. is "formed in dia-metrically opposite sides of thestandard, while the rod proj ects laterally through'V the opposite faces oi the standard asshown. The upper' end of the piston rod, however, is reduced in This cylinder is provided with an axial bore or plstonchampiston width to correspond to the thiclrness of the standard, and in this upper end 1s formed a recess, in which is secured a drill holding die 13. The bore 12 of the guide-way or standard. 11, extends up into the standard a short distance above the end of the piston stem, and at its upper end it terminates into a semi-circular curve, in which a 'die 14 is itted, which is acounterpart of the die 13. The recess in the end OiI the piston rod,'in which the vdie 13 is secured, comprises two abutting vsemi-circular recesses oi'dierent diameters. v

Upon the front side of the standard, which is the side from which the drill-bits are inserted in the jaw dies constituting the vise, I form a forwardly projecting ledge 34, to the under side oi' whichl removably secure by bolts a-swag'e. die 35 which l term a clearance swage die. This die comprises a depending V-shaped lip or die portion, which is adapted to work into the clearance spaces between the lips of a drill-bit, and which projects from a baseportion, which is adapted to be removably ,secured by 'aset screw 36 to the under side ol the projecting ledge 34 oi the standard. The ledge 34 terminates with. downwardly extending` ends, which project slightly beyond thesides oi the standard 1l, and circular hearing recesses 37 are formed at diametricallyopposite points on the l'ront side of the standard, so as to coincide with semi-circular abutment recesses 38, on the inner edges ol' the'depending endsv ol ledge 34. The surfaces of the recesses 38, merge into inwardly and downwardly inclined 'lans 39, which l'orrn supports, the object of which will. presently appear. y

V'Jithin the recesses 37 and 'the semi-circu- 38, are pivotally supported a pair of squeezer jaws 40, by nieans of circular bosses 41, formed Ion thel outer ends 'ol the said jaws, which bear in the recesses 37. These bosses fare of the same diameter as the ends of the squeezers, and

'coincide with the said ends, so that while theyrest in the 'recesses 37 ,/the ends oi the squeezers hear against the surfaces oi the abutment recesses 38.

The inner ends ol the squeezer jaws 40,l

terminate in -V-shaped ends, the upper and under laces of whichconverge at an angle oi' 45 degrees, and in their inoperativel positions the jaws rest upon-thesupporting l' aces 39, of

.the depending ends oi' the ledge 34, as shown in dotted lines Fig. 17.' The nnder sides of the jaws are formed with substantially kJ-- shaped recesses'42, the purpose of which will presently appear. y Y. j

The jaws 4() are held in their bearings hy eccentric washers 43, which are'securedlhy cap screws to the depending ends oi lthe ledge 34, in such a manner that when in operative'position they lie partially overl the ends of the 'aws and revent theni from hecoining displaced, hut which when the screws areloosened swing down and outoi the path of the jaws, so that theyvniay be withdrawn `On the piston rod 9, below and in vertical line with kthe die 35, is removably securedv a block 435, the lower end ol which rests upon a horizontaliace formed on the piston, while the block is .secured thereto by cap screws 44... This block is 'formed with ati-shaped die.45, in line' with the' die 35, and on 'each side of'the die 45 with upwardly extending ends, 'which lie against enter the- V-Chaped recess in lugs 46,- terminating in semi-circular upper j the lower edges of the jaws 40, and which raise' the said jaws, and their under edges as the pistonapproaches the limit of its upward movement, as will appear'by reference to Fig. l.

The arrangement 'of gripping and squeezing dies illustrated steels which frangernentof the standard l1, is such that when other styles or" drills are to 1oe sharpened, the dies and squeezers illustrated. -may be lugs pass into the recesses at the saine time the'lower swage die raises yond thc other sideof the standard.

` ard, which is and described', is particu-"f" cross section, but the ar-l removed, and other dies and lorniers eniployed, these dies and forniers being enihodied in a separate application.

VV'hc-,n a drill hit of cruciiorrn tool steel is laid on the lower swaging die 45, with its ribs straddling the t or wedge-shaped point, and the piston is raised, the lower die is carried up tothe upper die, and are raised by the end lugs 46 and as the piston continues its upward movement, the 42 of the jaws ,and

the drill hit against the upper swage die, and

'the t'dies and jaws pressinto and smooth out the upper and lower-sides oi its ribs, as will be more hilly descr'hed hereinafter- The cylinder is providedwith a valve chest a lange portion 48,

47, which com rises the cylinder. The enformed on the side of trance tothe valve chest is threaded, and a cover 54is threaded to it, andl is provided with-.a hexagonal `wrench receiving portion hy whichjthe cover .may be screwed into it. An, axial' aperture `is formed through the cover, anda valve stern extends into and through the cap and is coupled to the valve, and 'toits outer end a handle 55 is secured. This handle is 'threaded to the valve stern an d its huh is split and is provided with a clampin holt, by which after it is screwed onto the va ve stern it is rigidly clainped thereto by its clamping bolt.

to a supply of fluid pressure'.v

The rear end' of the cylinderis provided with an integralvertical standard 80, "which is provided with a circular aperture 8l, in alinem'ent withl the Aaxial cent-eroi the drill gripping 'dies when they. are in the position shown in Fig. 1. Within the. aperture 81, l

insert the huh portionoi aharnmer piston cylinder 82. The cylinder' is'iorined ywith a circular' iiange 83,'

at one end, from which the hub projects, and the hub is inserted-'from the rear-side of the standard, and the flange is bolted /lto the standard by bolts 84, vwhich' .extend through anpl healso to the'opposite side of the standthe front side, a dolly guide and support 85, T his guide'v comprises va flange Se, which is bolted to the standard luy the bolts 84, and a projecting head 87," provided with an axial-bore 8S, that is positioned in alineinent with the dies and the hammer pissecure ton cylinder, and a drill lip forming punch or' dolly 89 is reciprocally mounted inthe bore "79. ylfhis dolly comprises a shank portion which is. iitted snugly but reci bore ol the cylindricalhuh, an 4alip cutting head portion of greater diameter. The shank is inade long enough to extend through the a' erture in the supportv into the hammer cylind thel squeezer jaws l A hose connection 79 is connected to the valve chest, from which a hcsewhih l do not show, can he lconnected rocally in thev er and into the path of a'hanuner-pis-- l' provided with a removablerear 'cylinder4 tonQO, reoiprocally mounted in the cylinder s 82.' A The'lipped end or head portion ofthe dolly is round, and the dollies are.' formed with heads of varying diameters to meet the .requirements'of the drills beingsharpened.

The cutting lips ofthe dolly are arranged either 'radially upon the face of its head, which is madeat right angles to ,the axial center ofthe dolly, or a pair of these lips cross at right angles through the axisof the dolly head, in the case of a dolly'whichis used for cruciform drill steel.l I preferably employ a full triangular -or inverted V- shaped rock cuttin ip on the dolly, and

form the dollyfor t 1e character of drill desired. y Y

The pneumatic Ahammerpiston cylinder is head 91, which is preferably threaded to the cylinder and is provided with a wrench. re ceiving nut. The hammer piston is madein two diameters and the cylinders bore isconl sequentlymade inl two diameters.. The larger diameter of the hammer piston' forms about one-third 4of the length of its smaller diameter portion, and a right angledshoulder 92 is formed at the junction, of the larger and smaller portions of tlie piston. A n axial aperture is formed'in' the rear end ofthe ham-l mer piston, which extendsinto itfrom its rear end to near its front end, and a circumferential row of elongated port holes93, 'is

formed radially through the shelltointersert I the inner terminal end of this axial a erture.

-I preferablyruse but four 4offthelse ra ial port holes and preferably 'place each pair of. them other through the shell.

The cylinder is' arranged to'y reciprocally supportthe piston,.and an air inlet port 94 at diametrically 'opposite centers to' each..

is formed in it, to which is connected one end of a pipe 95, which connects atits other end with the fluid supply port 7 0, of the valve chest 47, the pipe being connected to the nipple 75 by a' union 96. The forwardly projecting hubportion 97 of the cylinder S2,

. shank ofthe dolly extends into this chamber,

is provided with an axial chamber 98, which -is made alittle larger than thediameter of the striking end of the hammer piston or the rear end of the shank of the dolly. "lhe and the ,striking end ofthe hammer piston also extends into it on the forward stroke of ward. `The fluid enters through the port 94,"

its reciprocal movement, and strikes the shank end ofthe dolly, as will beunderstood by reference-to' 3.

In Fig. 3, the hammer piston'is in position to receive the actuating fluid to start it forand passes into the lbore of the'hammer piston, through the ports 93, and drives the y piston forward against the dolly,'and .asthe ports 93 pass within the chamber 98, the uid exhausts 'into said chamberandout through anfexhanst port 99. The `luid then exerts -a pressure u on the shoulder 92 or' the hammer p1stonan drives 1t rearward again.

The dolly is reciprocally mounted in its supporting head independently of the ham' mer piston, and is adapted to be struck by said 'piston on each forward stroke and.

driven against the opposing end of the drill bit. It is necessary, however, that the dolly be held normally away from the end of the drill bit, and in position to be struck by the.,

hammer piston, and that after being struck and driven against 'a drill bit, it should be instantly returned independently of the rearward movement of the hammer piston, as it is essential that the rearward movement of the dolly be'free and independent of the reciprocal movement of the lhammer piston, and at the same time as positiveand quick and have` a resilient variable throw within thelimits of its full reciprocal stroke,V

so that if'the burying of its lip into thesoft.

tien ofy its return stroke before the, hammer piston again struck it, but normally it should vhot steel of' a drill bit should make it slightly' 'slower in its return stroke than the hammer piston, it would still make the greater pormake its full re'turn stroke slightly quicker than the hammer piston makes its backward stroke and be in position to receive the full force 'of the hammer pistonsA forward stroke.

The opposite side of-the shank of the dolly is provided with oppositely arranged holes- 100, -which extend into it4 aV short distance'. Into these holes I extend the ends of a pair `of springs 101, which'ends'are. bent over at" right angles to the body of the springs, and I extend the opposite ends of the springs into holes 102 formed into the top of the vise cylinder or base flange 5 of the standard 80. I

AndIpreferably secure the lower ends of the sprlngs in these-holes by forn'ling,threadedl holes 103 in the sidesof the cylinder, which extend into and intersect-the holes `102, and into these threaded holesI secure set screws 104,'which extend to and intersect t? e ioles 102, and these set screws are screwed against thelower ends of the springs and-securely held there within the holes 102. Coils 105. are formedintermediate of the ends of the springs andarranged under eontractive tension, by which t they exert pressure upon and hold 'rio the dolly normally againstV the end of its I support andthe inner end of its shank in the lplace'dfin ]aws in striking relation'gtoithe injuring 'are heated in a forge to a ,dolly or he operated when a drill hit isA notr in the jaws, the beveled peripheral surface of the head receive the spent hlows ol' the dolly without the lips ol the (lolly.

Upon the forward portion 'of the cylinder' 5, is termed a hub 110, having a threaded axial hole, in which one end of ahar or tulie 111 is screwed. T his har vextendsl forward parallel with the direction in which the drill hit extends, when clamped, and upon vit is slidahly mounted one end of a drill supporting arm 112, which is provided with a set screw to secure the said arm at any point of the length of the bar.

The oppositeend of the arm is provided with a rest 113, which is arranged and adapted to support the rear ends of the drill hits so that they Will rest in horizontal alineinent with the center o'the dies when gripped by said dies. 4 i

The rockA cutting drill hits to he resharp cned or` the drill steel in drill lengths upon Whichgit is desired to :torni rock cutting lips, suitable degree of 1 heat, and each drill. 1oit or drill steel is inH n @rust about even rl`he piston Set of roel; cutting serted inthe dies and gripped and held there by the pneumatic pressure of the inwardly moving piston, and the roch cutting lips are formed Aon vit by the reciprocating dolly,

which is operated hy the reciprocating pis ton 90, ymounted .in the cylinder' S2. ri'he drill gripping dies 13 and .14, have a circular gripping surface, as shown and described.

The operation of my pneumatic drill Sharpener is as follows: A supp-ly of comn pressed air under the desired. pressure is led 'rom a source of supply through the pipe or hose '79, a fragmentof which is shown in .liigs land-2. The handlelil, is then moved in the direction ot' the arrowwdiig. when the actuating l'l'uid will p ass through the cylinder 5, below the piston 8, which will therehy he raised to the position shown in llig. A drill bit or a bar of drill steel, the point ol: which is to life resheroened, or on which anew lips to he formed, is previously placed in the lower hall' die 13 of 'the vise, so that its end to he sharpened is with the trout end of the die.. then moves up quickly and clamps the lsaid drill hit against the upper halt die 14 of the standard. ln practice, l preferably use a pressure oi about S0 pounds er squarev inch, hut less pressure will hold the'drill hits satisfacthrily. This pressure is so great that the half dies will make indentations into a cold har ot tool drill steel. rlhe piston hammer heing in .the positionshown in Fig. 3, the actuating fluid, which is preferahly air, on entering the cylinder passes into the hore of the piston hammer-'through the l:ortis Q3, and drives the hammer forward against the dollypwhich is thereby driven of the dollywill strike in the hei. eled tapering entrance to the die,whieh will desired lagainst the hot endl of the drill, upsetting .it so that it spreads out against the surface ol' the hell-shaped entrance to the die, while at the'same time the cutting lips are formed thereon. The very rapid reciprocating movement of the hammer piston causes .the :lolly to strike with great rapidity against the drill hit, and the springs 101 draw the dolly hach alter it strikes each lolow; thus the dollyY Ksition after each blow independently of the air controlled reciprocating movement ofthe hammer piston.,

set ol roch cutting lips onthe end ottheydrill y steel, the said steel' is first. heated to the revquired degree, andthe heated end placed ,upon the lower die 13. The compressed air -is then turned on, which causes the piston-to rise, and the dies 13 and 14 togrip the drill har. The hammer `piston and the dolly are actuated at the same time, and as the dolly rilres rapidly against the end ofthe drill har it forms the cutting lips thereon, and at .the same time upsets the hot end in the conical entrance to the gripping and holding dies, and thus reelorms the rilos and the tapering head portion at the cutting end oi' the drill. This first lip forming action ol the dolly invariably leaves a somewhat uneven surface of metal in the bottoms ol' the lips, and in addition, the ribs hack of the lips are not as smooth y, regularly, and 'fully formed by this lirst action of the dollyas is drilLhit; consequently, it is necessary that the lins ol' metal at the Abottoms of the recesses or spaces lbetween the llips he pressed clearance passages for the/rock cuttings from the cutting edges of the lips between and past the ribs ol the head portion to the'nhody el, the drill hit, andalsdthat the smoothly pressed out along "i "srdes he tween each other.- These re'qu a second working, 'which'consistsiiireinoving. the drill-har from the grip ping andy 'holding laws. The operator then draws the drill l hit out to the position shown in Fig. 3, when it will rest dn the il-shaped die 45, so that the edge ol' the die will extend'into 'the' space beu tween the ribs (see Fig. l), and consequently have been swag'ed up hy. the first working action of the dolly bear directly'on the edge ol' the lower die. The throttle valve, is then opened by 4turning the crank lar enough'to open the port 69, leading to the vise operating cylinder, which causes the piston rod to instantly rise, which raises the lower swaging presser dieand the drill bit up against the upper swage presser 'di e, Which depends into the I upper space offrihs'onthe'upper side' oi' the l drill bar, anclfatQltlfsame time thelower automatically. assumes its normal po-v ln order to sharpen a drill, lor form a new of thedrillbar' -shaped spaces between the rock cutting.

smoothly down, asthese spaces form thev nements lead.

such edges or uneven Welts or fins ol' metal as 100 required in a perfectly formed and sharpened presser die raises. the side swaging dies, which as they move upward move into the opposite side spaces of the upset head portion of the drill bit,' and between the ribs of its newlyformed rock cutting lips.` The upward squeezingA pressure of the .lower and upper presser dies and the lateral squeezing pressure oi' the side dies presses and squeezes the uneven surfaces of metal at the bottom of the ribs, and also the adjacent sides of the ribs out smooth and even, and also shapes them up into the desired form, and presses the botl in the already tom apexes of thel ribs into sharp clea'r strai ht linesdown even with the longitudinal p ane of the body of the drill bar. The operator then instantly reverses the air pressure 'to the top of the piston, which instantly lowers the piston and the lower pressing die, and as the side presser dies are below the horizontal plane of their pivotal centers, they instantly follow the lower presser die and piston down to the end of its and their downward o Jerative movement, which releases the drill bit. rIhe drill bitris then returned to the gripping and upsetting jaws 13 and 14, with its diverging tapering. ribbed head portion drawn back into the conical aperture of the dies, and with its already formed wedgeshaped rock-cutting lips positioned .opposite to the spaces between the lips ofthe dolly s o that the dolly will lit into the lips already formed.. The compressed air is then turned on to operate the vise jaws and to grip and hold the' drill-bit. The piston hammer is then startedup and the dolly againstrike's formed lips, which completely shapes and smooths lthem up into perfectly smooth and clear-cut rock cutting li s.-

- While I have illustrated preferred construction and arrangement of my iu'id controlled .or pneumatic 'drill Sharpener, I do not Wish toA be limited to the precise construction and arrangement shown and described, as many changes might be made without departingfrom the spirit of my invention. l n

Some of the elements of this invention are shown in my pending applications, Serial Nos. 377,985 and 388,351.

Having described my invention, wl'iat I claim as new and desire to secure by Letters Patent, is:

'1. In a drill sha1' ening machine, the com# binatlon with a cy inder, 'a standard on the cylinder, a piston in the cylinder having a stem.

and describedv the cured to the Ipiston stein in line with the. iirst die, a pair of dies pivoted at their out'er ends lo thestandaid, their pivoted ends being on a line atright angles to the piston stem,-'the inner ends oi said dies extending toward each other, and .being engaged bythe piston stem on its-upward movement, whereby said inner ends are raised and act in'eonjnnction With the dies secured to the standard and lpistonv 2. lIn a drill sharpening machine, the combination of a` cylinder, a standard thereon the cylinder having a stem projecting into the standard, and .means for operating said piston, with a pair of dies secured. respectively to the piston stem and to theledge of said standard a pair of 'dies haring circular 1provided with a projecting ledge, a piston in.

bearing luoson their euterends, which lie in corresponding recesses in the standard, one on each side of its vertical center, their inner ends extending toward each other, said pivoted dies being Iraised by the piston stem to act in conjunction with the irst pair of dies.

3. In a drill sharp eaaiiig'machine, the coinbination of the supporting frame, the cylin' der, the yoke-shaped standard on said cylinder, and the piston reciprocally mounted in said cylinder and standard, with a pair 'of squeezing half dies secured to said standard and piston arranged to register opposite each other, said 'squeezing dies being provided with introverted vV-.shaped lips registering opposite each other and adapted to spaces and fit between the ribs of cross-rib drill tool steel, the squeezer die of said piston being provided with projecting' fingers on its opposite side portions, a pair of swinging dies pivotally mounted on said standard at one end and-,provided with V-shaped jaw faces at-,their opposite ends arranged to be moved to register opposite each other to enter the spaces of and fit .between the diametrically .opposite ribs of cross ribdrill tool steel from said 'rst named squeezer dies, each of said swinging dies being arranged to rest-on the fingers-of said pistons squeezer die.

In testimony whereof Igaiiix my signature in'presen'ce o'f two witnesses.

. JOHN GECRGE LEYNER.

Vv'itnesses:

JOHN A. FARWELL, ROBERT 'JOHN 'WALTMAN- enter the 

